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1、精品文檔automatic batching and weighing system systemnow, along with the development of science and technology, automatic batching and weighing system has been widely used in metallurgy, coal, chemicals, building material industry, etc. automatic batching and weighing system can be set according to the

2、input ratio and flow control of material flow, thereby achieve control of product quality and yield of the objective is to realize the automatic production process, and intelligent, enterprises scientificmanagement, safeand stable productionand energyconsumption is the important technical means. com

3、puter control system in the production of ingredients used not only can improve the yield and quality ingredients and greatly reduce the labor intensity, and post to improve production efficiency.belt batchingsystem is a continuous totalizingautomaticweighinginstrument. it has played a critical role

4、 in coal, chemical industry, metallurgy, building materials,food and other sectors that are crucial to nationaleconomyand peoples livelihood. the cumulative control of some mixed materials batching is realized by batching scale. this accuratecumulative control cancut down the cost of manufacture, im

5、prove the quality of the product and enhance the efficiency of labor.automatic batching and weighing system is a kind of integratingtransportation, measuring, mixing in an online automatic weighing apparatus measured dynamic. this system consists of one or more ingredients belt scales, can show not

6、only transient flow and total amount of conveyor belt, can also according to the value of the instantaneous flow deviation to adjust to the size of the feed to flow, constitute a closer setting control system, and achieve constant flow of purpose. along with the rapid development of industrialproduc

7、tion,electronic belt scale increasing demand of burdening system, was widely applied in a pan of metallurgy, power, chemical industry, food industry etc of process control. at the same time, along with the computer technology and the rapid development of the automatic control technology, the system

8、application technology more advanced, more extensive, field can take the schemeis more agile diversity, and, due to the system often costly, users of the actual conditions are also different. therefore, careful, choose a reasonable, perfect, economic solution appears especially importantthe structur

9、es of the belt scales ingredients consists mainly of transmission mountings, weighing transducer speed sensor, scale, active roller, driven roller, conveyor belt conveyors, drag, adjusting devices, equipment etc. whenthe scattered in conveyor belt scale body through the material on the weighing scal

10、e body, the speed sensor and sensor signal and the weight of millivolt belt speed pulse signal through the junction box to strap balance meter.the overall design philosophy of the automatic batching and weighing system of the belt is: before the belt conveyer is put into operation, the settlement va

11、lue of the flow of the supplies is established on the keyboard by the attenbant to carry on the belt. after the system is put into normal running, loading signal of the belt that the one-chip computer samples and the speed signal leaves, walk belt speed signal and belt instantaneous weight, unit of

12、length is it can calculate out belt twinkling of an eye flow f of supplies to multiply (t) . the flow can be in charge of the number and show, offer the craft data to attenbant to consult in the twinkling of an eye. 8031 systems and then compare the actual value of the flow instead of the establishi

13、ng value, calculate out controlling amount vi after pid regulates operation, and then change into the electric current and output the signal, and then enlarged and controlled leading the open angle of silicon controlled rectifier, realize regulating the _ofunction of the electricity electromechanica

14、l magnetism clutch excitation electric current of slippery difference, thus regulate the rotational speed of the slippery difference electrical machinery of executive body, enable transporting the flow of supplies on belts to stabilize in the adjacent place of settlement value as much as possible, h

15、ave a good static index and dynamic performance.automatic batching and weighing system is widely applied in industrial and agricultural production and social life in all areas. especially the metallurgy, coal, chemicals, cement industries, often need to spread in the dynamic process of belt conveyor

16、, and continuous weigh on conveying the flow adjustment and control, accurate ratio.the quality control of ingredients directly relates to the enterprise can produce smoothly. if the quality of compound reach requirements, causing a waste of energy, raw materials, while influence the quality of the

17、products and productivity, and some of the important position of the ingredients for the production of mistakes even a accident. therefore,the high precisionandingredients ingredients and how quickly the whole manufacturing restricts the product quality and yield response, so the quality and yield o

18、f compounding process control give enough attention. electronic says automatic batching system can be set according to the input ratio and flow control of material flow, thereby achieve control of product qualityand yield of the objective is to realize the automaticproduction process, and intelligen

19、t, enterprises scientific management, safe and stable production and energy consumption is the important technical means. computer control system in the production of ingredients used not only can improve the yield and quality ingredients and greatly reduce the labor intensity, and post to improve p

20、roduction efficiency.3歡迎下載精品文檔because the system of production lines, with the sameingredients and composed of daytime belt says system for example. this system mainly consists of ingredients, instrument, electronic control frequency, industrial control computer cabinet, and monitoring and managemen

21、t software.1) ingredients electronic saidingredients of electronic belt says the bulk materials through belt of automatic weighing and continuous accumulated, transportation and measuring two functions. weighing part adopts resistance strain working principle, structure, roller leveraged practical w

22、ork, belt constant velocity measurement called by feeding speed regulating superior to change the material flow, this type of enterprises with more than say for production process control.2) meter controllerinstrumentation control including daytime belt says, each instrument meter from receiving bel

23、t says the weight of the weighing transducer speed sensor signal and the changes of the belt speed pulse signal, calculate flow and accumulation. and will flow signals in 4-20 ma simulation current form, work-managing machine will flow for industrial computer signals and machine after comparison, ac

24、cording to a certain value of output control rule 4-20 ma adjusting control signal, feeder, forming a single speed closed-loop control certain material flow, achieve the goal.3) inverter arkark of the converter, the dynamic control switchfrom higherfeeding motor control signalsthe rev. stop, simulta

25、neously also accept four a from polymerizing-kettle - 20 ma adjustment, to change the output signalpower supply of frequency, and control site 7 feeder speed. if the inverter power, _ 。 4歡迎下載to configure the cooling fan, to ensure the converter can work normally.4) industrial control computer and so

26、ftwarehuashuo use polymerizing-kettle ipc - 610 # 14 industrial pc chassis frame 6179l length, configuration pca - 512m memory and cpu card, with 80g hard disk, a pcl - 746 + 4 ports rs232 485 communication interface card 422, 2-4 1720utype pci simulation output channel segregation, work-managing ma

27、chine as pc, through two-way communication interface rs485with belt says, through rs232instrument online communication interface with dynamic two-way the plc control, analog output online control signal control feeding machine to flow, which constitute a complete system of the ingredients. other vit

28、al industrial computer interface rs485two-way communication, to prepare for and plant upper polymerizing-kettle communication.the main functions are monitoring software, according to the production of formula and yield target weighing process of automatic control, statistic data managementand weighi

29、ng achieve print. system software has a variety of on-site control modeand the input, a formula of adapting to different engineering requirements, users can set alarm print time parameters, use the menuinterface, easy to use, users can through the mouseor keyboard operate on the ingredients, control

30、 and management system.the main components of the control system are belt scales, programmable controller, communication system design and monitoring software modules etc, electronic belt says the structure and working principle of below a specific instructions are not here, programmable controller

31、using omrom company cqm1h type module type programmable controller, configuration cqm1h cpu2t e type cpumodule, pa203cqm1 -power module, four cqm1-212 type 16 points i/o input module, 2-16 points oc222cqmtype of i/o output module, the system module points 5歡迎下載精品文檔total 112. each electronic belt say

32、s about the input signal is plcbelt running deviation switch alarm signal, belt skid alarm input, alarm, main belt running and site operation dish central/site selection, on-site control control feeding machine and belt conveyor start/stop, central control feeding machine and belt conveyor and stop

33、signal, each electronic belt says about plcoutput signal a belt running deviation indicator lights, startup, belt skid feeder, start signal of belt conveyor.communication system design choices as pcsoftware platform vb6.0 by use basic6.0 visual, with its friendly interface, easy to use, develop stro

34、ng practicability etc, are widely used in both at homeand abroad.monitoring software module of the software is based on windows2000, operating system, and basic6.0 visual programming language, make access2000 database management. mainly used for system operation module which enter or exit site contr

35、ol condition, operating, establish initialization, a newproduction tasks, keep the ingredients of the project, the next after each parameter can be automatically boot, enter the project, in order to prevent general people literally, set up the start-up system login function. statements management mo

36、dule function is the first enter inquires, the operator can pages of all channels of historical data and browse ingredients, inquires according to the passage, when the date and time, divisions, data ingredients generate reports and print.on-site control module mainly used for setting engineering pa

37、rameters, monitor and control field ingredients.setting module for setting the initialization parameter ingredients and engineering. namely, the time, the production of numbers, initial placement, automatic reset manually/cumulative class, single/completion and other parameters said belt.the structu

38、res of the belt scales ingredients consists mainly of transmission mountings, weighing transducer speed sensor, scale, active roller, driven roller, conveyor belt conveyors, drag, adjusting devices, equipment etc. whenthe scattered in conveyor belt scale body through the material on the weighing sca

39、le body, the speed sensor and sensor signal and the weight of millivolt belt speed pulse signal through the junction box to strap balance meter 3by feeding equipment materials to electronic belt scales, says the speed sensor weighing sensors and weighing and speed signal sent to weigh instrument met

40、er, weighing the instantaneous flow conveying materials, accumulation, at the sametime, the data such as measuring the measured value and value deviation, through the inverter to adjust the speed of the motor drive belt scales, makeaccurate to user setting to flow, material flow to a constant.for el

41、ectronic belt scales, can choose just qualitative s-type weighing transducer. the connection modeusing joint bearings, tensile condition in the lateral force, the ability, can be installed on the seal, compact structure, within the beam.the system is composed of a platform characteristic of a machin

42、e to control the multiple feeder, in order to achieve certain proportion between each feeder, the work is connected, and give a quantitative as current ratio, so its modified control structure is more complex.自動(dòng)稱重配料系統(tǒng)目前,隨著科學(xué)技術(shù)的不斷發(fā)展,自動(dòng)稱重配料系統(tǒng)已經(jīng)廣泛應(yīng)用于冶 金、煤炭、化工、建材等行業(yè)中1。自動(dòng)稱重配料系統(tǒng)可以按照設(shè)定配比和 流量控制各輸入物料的瞬時(shí)流量,從而

43、達(dá)到控制各種產(chǎn)品的質(zhì)量和產(chǎn)量的目o 7歡迎下載精品文檔的,是實(shí)現(xiàn)生產(chǎn)過程自動(dòng)化和智能化、企業(yè)的科學(xué)管理、安全穩(wěn)定生產(chǎn)和節(jié) 能降耗的重要技術(shù)手段。微機(jī)配料控制系統(tǒng)在生產(chǎn)中的應(yīng)用不僅可以提高配 料質(zhì)量和產(chǎn)量,也大大減輕了崗位工人的勞動(dòng)強(qiáng)度,提高了生產(chǎn)效率。自動(dòng)稱重配料系統(tǒng)是一種連續(xù)累計(jì)自動(dòng)控制系統(tǒng),廣泛用在煤炭、化工、冶金、建材、食品等關(guān)系國計(jì)民生的各個(gè)行業(yè),配料系統(tǒng)可對(duì)物料的配比實(shí) 現(xiàn)累計(jì)量控制,而準(zhǔn)確的累計(jì)量控制可提高產(chǎn)品質(zhì)量,降低生產(chǎn)成本,提高 勞動(dòng)效率。自動(dòng)稱重配料系統(tǒng)是一種集輸送、計(jì)量、配料于一體的在線測(cè)量動(dòng)態(tài)自 動(dòng)衡器。該系統(tǒng)由一臺(tái)或多臺(tái)配料電子皮帶秤組成,不僅能夠顯示瞬時(shí)流量 和累計(jì)

44、量,還可以根據(jù)輸送帶的瞬時(shí)流量與設(shè)定值的偏差去調(diào)整給料量的大 小使瞬時(shí)流量更加接近設(shè)定值,構(gòu)成一個(gè)環(huán)控制系統(tǒng),達(dá)到恒定瞬時(shí)流量的 目的。隨著工業(yè)生產(chǎn)的迅速發(fā)展,電子皮帶秤配料系統(tǒng)的需求量日益增大, 被廣一泛應(yīng)用于冶金、建材、電力、化工、食品等行業(yè)的工藝控制。同時(shí), 隨著電子計(jì)算機(jī)技術(shù)和自動(dòng)控制技術(shù)的飛速發(fā)展,該系統(tǒng)所應(yīng)用的技術(shù)更加 先進(jìn),領(lǐng)域更加廣泛,可以采取的方案更加靈活多樣,而且,由于系統(tǒng)往往 耗資巨大,用戶的實(shí)際條件也各不相同。因此,慎重,全面地選擇一套合理、 完善、經(jīng)濟(jì)的方案就顯得尤其重。自動(dòng)稱重配料系統(tǒng)的結(jié)構(gòu)組成主要由輸送機(jī)架、稱重傳感器、測(cè)速傳感 器、秤架、主動(dòng)滾筒、從動(dòng)滾筒、輸送

45、帶、張緊裝置、拖動(dòng)裝置、調(diào)偏裝置 等組成。當(dāng)散落在輸送皮帶機(jī)上的物料通過秤體時(shí),秤體中的稱重傳感器和 測(cè)速傳感器分別把重量毫伏信號(hào)和帶速脈沖信號(hào)通過接線盒送往皮帶秤儀表自動(dòng)配料系統(tǒng)的總體設(shè)計(jì)思想為:皮帶輸送機(jī)投入運(yùn)行前,輸送皮帶上 物料流量的設(shè)定值由操作人員在鍵盤上設(shè)定。系統(tǒng)投入正常運(yùn)行后,單片機(jī) 采樣皮帶荷重信號(hào)和走速信號(hào),將皮帶走速信號(hào)與皮帶單位長度上的瞬時(shí)重 量相乘即可計(jì)算出皮帶上物料的瞬間流量 f(t)。瞬間流量可通過數(shù)碼管顯示 出來,為操作人員提供工藝數(shù)據(jù)參考。8031系統(tǒng)再將流量實(shí)際值與其設(shè)定值 進(jìn)行比較,經(jīng)pid調(diào)節(jié)運(yùn)算后計(jì)算出控制量vi ,再轉(zhuǎn)換為電流輸出信號(hào)h后 而后經(jīng)放大去

46、控制可控硅的導(dǎo)通角,實(shí)現(xiàn)調(diào)節(jié)滑差電機(jī)電磁離合器勵(lì)磁電流 的功能,從而調(diào)節(jié)執(zhí)行機(jī)構(gòu)滑差電機(jī)的轉(zhuǎn)速,使輸送皮帶上的物料流量盡可 能穩(wěn)定在設(shè)定值附近,并具有良好的靜態(tài)指標(biāo)和動(dòng)態(tài)性能。8歡立下載精品文檔自動(dòng)稱重配料系統(tǒng)廣泛應(yīng)用于工農(nóng)業(yè)生產(chǎn)和社會(huì)生活的各個(gè)領(lǐng)域。尤其 是冶金、煤炭、化工、水泥等行業(yè)中,常常需要對(duì)散料進(jìn)行皮帶輸送過程中 的動(dòng)態(tài)連續(xù)稱量,而且要對(duì)輸送中的流量進(jìn)行調(diào)節(jié)、 控制、達(dá)到準(zhǔn)確的配比。配料質(zhì)量控制的優(yōu)劣直接關(guān)系著企業(yè)生產(chǎn)能否順利進(jìn)行。如果配制的質(zhì)量達(dá)不到要求,輕則造成原料、能源的浪費(fèi),重則影響產(chǎn)品的質(zhì)量和生產(chǎn)率, 并且有些重要生產(chǎn)崗位的配料失誤甚至?xí)o整個(gè)生產(chǎn)釀成事故。因此,配料 精度

47、的高低和配料速度的快慢制約著整個(gè)生產(chǎn)的產(chǎn)品質(zhì)量和產(chǎn)量,因此應(yīng)對(duì) 配料過程的質(zhì)量和產(chǎn)量控制給予足夠重視。電子稱自動(dòng)配料系統(tǒng)可以按照設(shè) 定配比和流量控制各輸入物料的瞬時(shí)流量,從而達(dá)到控制各種產(chǎn)品的質(zhì)量和 產(chǎn)量的目的,是實(shí)現(xiàn)生產(chǎn)過程自動(dòng)化和智能化、企業(yè)的科學(xué)管理、安全穩(wěn)定 生產(chǎn)和節(jié)能降耗的重要技術(shù)手段。微機(jī)配料控制系統(tǒng)在生產(chǎn)中的應(yīng)用不僅可 以提高配料質(zhì)量和產(chǎn)量,也大大減輕了崗位工人的勞動(dòng)強(qiáng)度,提高了生產(chǎn)效 率。由于該系統(tǒng)的兩條生產(chǎn)線相同,因此以七臺(tái)皮帶稱組成的配料系統(tǒng)為例。 本系統(tǒng)主要由配料電子稱,儀表控制柜,變頻器柜,工業(yè)控制微型計(jì)算機(jī), 及監(jiān)控管理軟件幾部分組成。1):配料電子稱配料電子皮帶稱對(duì)

48、經(jīng)過皮帶的散裝物料進(jìn)行自動(dòng)的連續(xù)稱量和累計(jì),具 有運(yùn)輸和計(jì)量兩種功能。稱重部分采用電阻應(yīng)變式工作原理,多托輾杠桿式 結(jié)構(gòu),實(shí)際工作時(shí),皮帶稱采用恒速計(jì)量方式,通過調(diào)節(jié)上級(jí)給料速度來改 變物料流量,本類型怕帶稱多用于企業(yè)內(nèi)部生產(chǎn)的工藝控制。2):儀表控制柜儀表控制柜主要包括七臺(tái)皮帶稱儀表,每臺(tái)皮帶稱儀表接受來自稱重傳 感器的重量毫伏信號(hào)和來自測(cè)速傳感器的帶速脈沖信號(hào),計(jì)算出流量和累計(jì) 量。并將流量信號(hào)以420毫安模擬電流的形式送給工控機(jī),工控機(jī)將流量信 號(hào)與機(jī)內(nèi)設(shè)定值比較后,根據(jù)一定的控制規(guī)則輸出420毫安調(diào)節(jié)信號(hào),控制 現(xiàn)場(chǎng)給料機(jī)的轉(zhuǎn)速,從而構(gòu)成單機(jī)閉環(huán)系統(tǒng),達(dá)到控制某種物料流量的目的。 3):變頻器柜柜中的變頻器,接受來自動(dòng)力控制柜的開關(guān)信號(hào)控制上級(jí)給料電機(jī) 的啟停,同時(shí)亦接受來自工控機(jī)的 4a-20毫安調(diào)節(jié)信號(hào),來改變輸出動(dòng)力電9歡迎下載源的頻率,從而控制現(xiàn)場(chǎng)7臺(tái)給料機(jī)的轉(zhuǎn)速。如果變頻器功率較大,則必須 在柜體中配置散熱風(fēng)扇,以保證變頻器能正常工作。4):工業(yè)控制微型計(jì)算機(jī)及軟件工控機(jī)主機(jī)選用華碩ipc-610型14架裝式工業(yè)pc機(jī)箱,配置pca-6179l 全長 cpuh, 512m內(nèi)存,80g硬

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